Zetsubou-sensei and the students go on several unusual class trips, including an archaeological expedition, the Museum of Unnatural History and Daisan Sentaku City- the city of the inexplicable third alternative. You know, like, when you're trying to decide whether to get a puppy or a kitten... and you end up with a crocodile? The students also practice selling themselves (legally), getting over their self-entitlement, the art of soft landings'- a.k.a. breaking bad news gently.'